Kernel: nf_tables: pointer math issue in nft_byteorder_eval()

A flaw was found in the Netfilter subsystem in the Linux kernel. The issue is in the nft_byteorder_eval() function, where the code iterates through a loop and writes to the `dst` array. On each iteration, 8 bytes are written, but `dst` is an array of u32, so each element only has space for 4 bytes. That means every iteration overwrites part of the previous element corrupting this array of u32. This flaw allows a local user to cause a denial of service or potentially break NetFilter functionality.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

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Linux kernel 安全漏洞

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在nft_byteorder_eval()函数中，代码迭代循环并写入 dst[0]、dst[1]、dst[2]等，每次迭代都会写入 8 个字节，但 dst[] 是一个 u32 数组，因此每个元素只有 4 个字节的空间，这意味着每次迭代都会覆盖前一个元素的一部分。

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